1. In vivo positron emission tomography imaging of mitochondrial abnormalities in a mouse model of tauopathy.
- Author
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Barron AM, Ji B, Fujinaga M, Zhang MR, Suhara T, Sahara N, Aoki I, Tsukada H, and Higuchi M
- Subjects
- Animals, Brain pathology, Disease Models, Animal, Female, Inflammation, Male, Mice, Transgenic, Alzheimer Disease diagnostic imaging, Alzheimer Disease pathology, Brain cytology, Brain diagnostic imaging, Functional Neuroimaging methods, Mitochondria pathology, Positron-Emission Tomography methods, Tauopathies diagnostic imaging, Tauopathies pathology
- Abstract
Damaged mitochondria may be one of the earliest manifestations of Alzheimer's disease. Because oxidative phosphorylation is a primary source of neuronal energy, unlike glycolysis-dependent energy production in inflamed glia, mitochondrial respiration could provide a selective biomarker of neuronal deterioration in Alzheimer's disease. Here we used a recently developed positron emission tomography (PET) probe targeting mitochondrial complex I (MC-I),
18 F-BCPP-EF, to non-invasively visualize mitochondrial abnormalities in the brains of tau transgenic mice (rTg4510). Tauopathy and neuroinflammation were visualized by PET using a tau probe11 C-PBB3 and a translocator protein probe,18 F-FEBMP, respectively. A marked reduction in18 F-BCPP-EF uptake was observed in hippocampal and forebrain regions of tau transgenic mice, colocalizing with regions of tauopathy, neuronal damage, and neuroinflammation. MC-I signals were highly correlated with atrophy assayed by magnetic resonance imaging, but negatively associated with inflammatory signals, indicating that neuronal metabolic signals measured by MC-I PET were robust to inflammatory interference. MC-I may be a useful imaging biomarker to detect neuronal damage and metabolic changes with minimal interference from concomitant glial hypermetabolism., (Copyright © 2020 Elsevier Inc. All rights reserved.)- Published
- 2020
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